A new unbiased Monte Carlo method shows that a polaron coupled to a double-well lattice potential yields a concave temperature-dependent mobility, qualitatively matching the anomalous transport and Mott-Ioffe-Regel violation in SrTiO3.
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Anomalous temperature dependence of polaron mobility in a nonlinear double-well potential: unbiased X-propagator approach
A new unbiased Monte Carlo method shows that a polaron coupled to a double-well lattice potential yields a concave temperature-dependent mobility, qualitatively matching the anomalous transport and Mott-Ioffe-Regel violation in SrTiO3.